REVENUE - disaggregated basis (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue from Contract with Customer, Including Assessed Tax	$ 16,702,558	$ 18,792,994
Contract with Customer, Asset, Net	4,390,832
Unbilled [Member]
Contract with Customer, Asset, Net	9,324,361
Progress Payments [Member]
Contract with Customer, Asset, Net	(4,933,529)
Over-time [Member]
Revenue from Contract with Customer, Including Assessed Tax	15,771,213
Point-in-time [Member]
Revenue from Contract with Customer, Including Assessed Tax	931,345
Defense [Member]
Revenue from Contract with Customer, Including Assessed Tax	14,036,638	15,744,494
Energy [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,403,732	2,251,536
Industrial [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 262,188	$ 703,964